package com.czy.utils.office;

import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.xwpf.usermodel.BreakType;
import org.apache.poi.xwpf.usermodel.Document;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFPictureData;
import org.apache.xmlbeans.XmlOptions;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTBody;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * word操作工具类
 * @author czy
 * @date 2022-3-10 22:00
 */
public class WordUtils2 {
    public static void main (String[] args) throws Exception {
        File dd = new File("D:\\file\\dd.docx");
        List<File> srcfile = new ArrayList<>();

        File aa = new File("D:\\file\\aa.docx");
        File bb = new File("D:\\file\\bb.docx");
        File cc = new File("D:\\file\\cc.docx");
        srcfile.add(aa);
        srcfile.add(bb);
        srcfile.add(cc);

        try {
            OutputStream dest = new FileOutputStream(dd);
            ArrayList<XWPFDocument> documentList = new ArrayList<>();
            XWPFDocument doc = null;
            for (int i = 0; i < srcfile.size(); i++) {
                FileInputStream in = new FileInputStream(srcfile.get(i).getPath());
                OPCPackage open = OPCPackage.open(in);
                XWPFDocument document = new XWPFDocument(open);
                documentList.add(document);
            }
            for (int i = 0; i < documentList.size(); i++) {
                doc = documentList.get(0);
                if(i == 0){//首页直接分页，不再插入首页文档内容
                    documentList.get(i).createParagraph().createRun().addBreak(BreakType.PAGE);
//                    appendBody(doc,documentList.get(i));
                }else if(i == documentList.size()-1){//尾页不再分页，直接插入最后文档内容
                    appendBody(doc,documentList.get(i));
                }else{
                    documentList.get(i).createParagraph().createRun().addBreak(BreakType.PAGE);
                    appendBody(doc,documentList.get(i));
                }
            }
            doc.write(dest);
            System.out.println("*****合成成功********");
        } catch (Exception e) {
            e.printStackTrace();
        }
//        appendDocx(dd,srcfile);
    }

    public static void appendBody(XWPFDocument src, XWPFDocument append) throws Exception {
        CTBody src1Body = src.getDocument().getBody();
        CTBody src2Body = append.getDocument().getBody();

        List<XWPFPictureData> allPictures = append.getAllPictures();
        // 记录图片合并前及合并后的ID
        Map<String,String> map = new HashMap<String,String>();
        for (XWPFPictureData picture : allPictures) {
            String before = append.getRelationId(picture);
            //将原文档中的图片加入到目标文档中
            String after = src.addPictureData(picture.getData(), Document.PICTURE_TYPE_PNG);
            map.put(before, after);
        }
        appendBody(src1Body, src2Body,map);
    }

    private static void appendBody(CTBody src, CTBody append,Map<String,String> map) throws Exception {
        XmlOptions optionsOuter = new XmlOptions();
        optionsOuter.setSaveOuter();
        String appendString = append.xmlText(optionsOuter);

        String srcString = src.xmlText();
        String prefix = srcString.substring(0,srcString.indexOf(">")+1);
        String mainPart = srcString.substring(srcString.indexOf(">")+1,srcString.lastIndexOf("<"));
        String sufix = srcString.substring( srcString.lastIndexOf("<") );
        String addPart = appendString.substring(appendString.indexOf(">") + 1, appendString.lastIndexOf("<"));
        if (map != null && !map.isEmpty()) {
            //对xml字符串中图片ID进行替换
            for (Map.Entry<String, String> set : map.entrySet()) {
                addPart = addPart.replace(set.getKey(), set.getValue());
            }
        }
        //将两个文档的xml内容进行拼接
        CTBody makeBody = CTBody.Factory.parse(prefix+mainPart+addPart+sufix);
        src.set(makeBody);
    }

//    /**
//     * 把多个docx文件合并成一个
//     *
//     * @param outfile    输出文件
//     * @param targetFile 目标文件
//     */
//    public static void appendDocx(File outfile, List<File> targetFile) {
//        try {
//            OutputStream dest = new FileOutputStream(outfile);
//            ArrayList<XWPFDocument> documentList = new ArrayList<>();
//            XWPFDocument doc = null;
//            for (int i = 0; i < targetFile.size(); i++) {
//                FileInputStream in = new FileInputStream(targetFile.get(i).getPath());
//                OPCPackage open = OPCPackage.open(in);
//                XWPFDocument document = new XWPFDocument(open);
//                documentList.add(document);
//            }
//            for (int i = 0; i < documentList.size(); i++) {
//                doc = documentList.get(0);
//                if (i != 0) {
//                    //解决word合并完后，所有表格都紧紧挨在一起，没有分页。加上了分页符可解决
//                    documentList.get(i).createParagraph().setPageBreak(true);
//                    appendBody(doc, documentList.get(i));
//                }
//            }
//
//            doc.write(dest);
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//    }
//
//    public static void appendBody(XWPFDocument src, XWPFDocument append) throws Exception {
//        CTBody src1Body = src.getDocument().getBody();
//        CTBody src2Body = append.getDocument().getBody();
//
//        List<XWPFPictureData> allPictures = append.getAllPictures();
//        // 记录图片合并前及合并后的ID
//        Map<String, String> map = new HashMap<>();
//        for (XWPFPictureData picture : allPictures) {
//            String before = append.getRelationId(picture);
//            //将原文档中的图片加入到目标文档中
//            String after = src.addPictureData(picture.getData(), Document.PICTURE_TYPE_PNG);
//            map.put(before, after);
//        }
//
//        appendBody(src1Body, src2Body, map);
//
//    }
//
//    private static void appendBody(CTBody src, CTBody append, Map<String, String> map) throws Exception {
//        XmlOptions optionsOuter = new XmlOptions();
//        optionsOuter.setSaveOuter();
//        String appendString = append.xmlText(optionsOuter);
//
//        String srcString = src.xmlText();
//        String prefix = srcString.substring(0, srcString.indexOf(">") + 1);
//        String mainPart = srcString.substring(srcString.indexOf(">") + 1, srcString.lastIndexOf("<"));
//        String sufix = srcString.substring(srcString.lastIndexOf("<"));
//        String addPart = appendString.substring(appendString.indexOf(">") + 1, appendString.lastIndexOf("<"));
//        //下面这部分可以去掉，我加上的原因是合并的时候，有时候出现打不开的情况，对照document.xml将某些标签去掉就可以正常打开了
//        addPart = addPart.replaceAll("w14:paraId=\"[A-Za-z0-9]{1,10}\"", "");
//        addPart = addPart.replaceAll("w14:textId=\"[A-Za-z0-9]{1,10}\"", "");
//        addPart = addPart.replaceAll("w:rsidP=\"[A-Za-z0-9]{1,10}\"", "");
//        addPart = addPart.replaceAll("w:rsidRPr=\"[A-Za-z0-9]{1,10}\"", "");
//        addPart = addPart.replace("<w:headerReference r:id=\"rId8\" w:type=\"default\"/>","");
//        addPart = addPart.replace("<w:footerReference r:id=\"rId9\" w:type=\"default\"/>","");
//        addPart = addPart.replace("xsi:nil=\"true\"","");
//
//        if (map != null && !map.isEmpty()) {
//            //对xml字符串中图片ID进行替换
//            for (Map.Entry<String, String> set : map.entrySet()) {
//                addPart = addPart.replace(set.getKey(), set.getValue());
//            }
//        }
//        //将两个文档的xml内容进行拼接
//        CTBody makeBody = CTBody.Factory.parse(prefix + mainPart + addPart + sufix);
//
//        src.set(makeBody);
//    }
}
